/*
 * Created on 1 f�vr. 2005
 * Created by Olivier Chalouhi
 * 
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.gudy.azureus2.core3.tracker.client.impl.bt;

import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

import org.gudy.azureus2.core3.util.Constants;

/**
 * @author Olivier Chalouhi
 * 
 */
public class TrackerLoadTester {

    private static final String trackerUrl = "http://localhost:6969/announce";

    public TrackerLoadTester(int nbTorrents, int nbClientsPerTorrent) {
        for (int i = 0; i < nbTorrents; i++) {
            byte[] hash = generate20BytesHash(i);
            // System.out.println("Adding torrent " + hash);
            for (int j = 0; j < nbClientsPerTorrent; j++) {
                byte[] peerId = generate20BytesHash(j);
                announce(trackerUrl, hash, peerId, 6881 + j);
            }
        }
    }

    public static void main(String args[]) {
        if (args.length < 2)
            return;
        int nbTorrents = Integer.parseInt(args[0]);
        int nbClientsPerTorrent = Integer.parseInt(args[1]);
        new TrackerLoadTester(nbTorrents, nbClientsPerTorrent);
    }

    private void announce(String trackerURL, byte[] hash, byte[] peerId, int port) {
        try {
            String strUrl =
                    trackerURL + "?info_hash="
                            + URLEncoder.encode(new String(hash, Constants.BYTE_ENCODING), Constants.BYTE_ENCODING).replaceAll("\\+", "%20")
                            + "&peer_id="
                            + URLEncoder.encode(new String(peerId, Constants.BYTE_ENCODING), Constants.BYTE_ENCODING).replaceAll("\\+", "%20")
                            + "&port=" + port + "&uploaded=0&downloaded=0&left=0&numwant=50&no_peer_id=1&compact=1";
            // System.out.println(strUrl);
            URL url = new URL(strUrl);
            URLConnection con = url.openConnection();
            con.connect();
            con.getContent();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private byte[] generate20BytesHash(int iter) {
        byte[] result = new byte[20];
        int pos = 0;
        while (iter > 0) {
            result[pos++] = (byte) (iter % 255);
            iter = iter / 255;
        }
        return result;
    }

}
